Phonograph



June 3 1924.

1,496,567 E. .J. TOMLINSON PHONOGRAPH Original il pril '7, 1919 3SheetsShee.t 1

INVENTOR EDWARD J-TOMLINSON er Z77? A TTORNE June 3 139214. 1,496,567

E. J. TOMLINSON PHONOGRAPH Original Fil April 7, 1919 5 Sheets-Sheet 2INVENTOI? EDWARD 'JOTOMLINSON June 3 1924. 1,496,567

E. J. TOMLINSON PHONOGRAPH Original Filed April 7, 1919 s Sheets-Sheet sINVENTOR How/n20 d.Tom.mso-

A TTOBNE g of magnets to act successively on pole pieces.

Patented-June 3, 1924.

UNITED STATES PATENT, OFFICE.

I EDWARD J. TOMLINSON, OF SUMMERFORD, OHIO, ASSIGNOR TO SPLI'IIDOBFELECTRI- CAL COMPANY, OF NEWARK, NEW JERSEY.

PHONOGBAPH.

Original application filed April 7, 1919, Serial llb. 288,886. Dividedand this application filed March 2, 1922. Serial No. 540,446.

To all whom it may concern:

Be it known that I, EDWARD J. TOMLIN- son, a citizen of the UnitedStates, residing at Summerford, in the county of Madison, State of Ohio,have invented certain new and useful Improvements in Phonographs, ofwhich the following is a description, reference being had to theaccompanying draw ing ,and to the figures of reference marke thereon.

.This invention relates to electrically. operated phonographs and asillustrated is particularly adapted for playing a record in the form ofa flat disk or plate.

This application is a division of my application, Serial No. 288,386,filed'April'7, 1919.

It is the principal object of my invention to provide a phonograph inwhich the sound record body is carried on a support electrically drivenin such a manner as to insure a constant speed and quietness ofoperation. In certain types of motors now in use more or less noise isproduced by them which is' a detriment to the production of the bestresults from the playing of the record.

Another ob ect of my invention is to secure the above resultswith amotor mechanism that is very simple in construction and highly efficientin its operation, consuming a small amount of current. Heretofore it hasbeen customary to use one or more pairs attached to the rotating supportfor the sound record body, but my invention is particularly directed tomeans for making all of the armature bodies or pole pieces do worksimultaneously instead of concentrating this work intoa pair of polepieces. I Figure 1 is a bottom view of the motor frame, but with thetimer parts removed.

Figure 2 is a View of the timer parts and mechanism-not shown in Fig. 1but on an enlarged scale to illustrate them more clearly. This figurealso shows diagrammatically wiring of the motor.

Figure 3 is a part elevation of the phonograph motor.

Figure 4 is a sectional view through the operating electromagnet andcore. 'Figure 5 is a plan view of the governor device shown in Fig. 3.

Figure 6 is a side elevation of a modifiedgovernor device somewhatsimilar to that shown in Figs. 3 and 5.

Figure 7 is a plan view of the stationary base member showing the polepieces, bracket member and bearing for the rotatable support which isshown in Fig. 8.

Figure 8 is a bottom View of the rotatable support.

Figure 9 is a fragmentary section on the line 1010 of Fig. 8.

Figure 10 shows an alternative form of pole piece which may be used inplace of that shown in Fig. 9; while Figure 11 is a fragmentary bottomView of F i 10.

Re erring now to the details wherein like numbers iefer to correspondingparts in the various views, 1 is a mounting plate having a centralopening 2 within which is positioned a base member 3, the same beingfastened to the plate 1 through the medium of arms 4 adapted to havescrews or bolts pass through the holes 5 in the arms 4. On one side ofthe plate or base 3 is disposed a. series of pole pieces 6 whichpreferably correspond in number and shape to pole pieces 7 that arecarried on the rotatable support member 8. As shown in Figure 9,

the pole pieces 6 and 7 are elongated as indicated at 9, in order topresent a lar or surface for the magnetic flux lines. he type of polepieces used on the base 3 or as armature bodies 7 on the rotatablesupport 8, may be of the laminated type as shown in Figure 10 whereinthe laminations 10 are are welded as at 11 to either the base 3 or thesupport 8. It will be understood that the base 3 and support 8 may ormay not be of a laminated construction, depending on requirements. Wherethe base 3 is made of a casting a central hub 12 is preferably castintegral therewith. The hub 12 serves as a core for a single winding 13.The top of the a referred to. A sound record support plate is carried onthe hub 18 being fastened thereto by any suitable means such as screw19, a dowel pin 20 being used to prevent the sound record support platefrom slipping out of position while the record is being played. As shownin Figure 3, the armature bodies 7 and the pole pieces 6 extend towardeach other to a point where a small air gap 21 is obtained. I preferablytaper plate 23 may be adjusted on thebase 3 for e the purpose ofshiftingthe position of the movable timer member 26 and the stationaryadjustable contact 27. The movable member 26 carries a contact 28 thatcooper-j ates with contact 27, the other end being turned over as at 29which turned over portion is engaged by a cam 30 having the same numberof indentations therein as there are armature bodies on the rotatablesupport 8'. The cam 30 is held on to an operating shaft in any suitablemannersuch as a screw 3L and dowel pin (not shown). The operating shaft,it will be understood is attached to the support 8 and passes throughthe hole 32 in the hub or core. 12 and through the base.3, a bushing 33being preferably used at the timer end to guide the shaft in itsoperation.

Attached to the base 3 is a lug 34 carrying a pivotal bracket. 35 bymeans of a suitable pivot pin held in the lug 34 inany'suitable manner,such as a cotter pin 36. The

bracket.35 carries a sleeve 37 within which a shaft is journalled. Oneend of the shaft carries a friction wheel 38 that is adapted to run onthe periphery of the support 8, being held in engagement therewith,'inany suitable manner, such as a spring 39 carried by the base 3. To theother end of theoperating shaft is fastened a member 40 which hasfingers 41 bent over forming a slot within which the resilient member 42is seated. On both ends of the member 42 are fastened weights 43 and itwill be noted that there is a slight clearance 44 between the Weightsand the fingers 41 so that the member 42 has a slight longitudinalmotion. A contact 45 is carried by the spring member 42 and acooperating contact 46 carried on an adjustable screw 47 which in turnis supported on an arm 48 that is fastened to the base 3, in anysuitable manner, such as a bracket 43. The outer end of the arm 48 isattached to an adjusting screw 50 carried by the arm48. An adjustingthumb nut 51 is fastened to the outer end of the screw 50 and a spring52 is adapted to hold the arm 48 in any position to which it is moved bythe thumb nut 51 and screw 50. It is seen that the movement of the thumbnut 51 moves the arm 48 to alter the position of contact 46 withreference to the position of contact 45 and it will be further seenthat- 55 in electrical contact with the terminal.

stud 56. The switch blades 53 and 55 are mounted in such a manner as tobe connected together by a switch blade 57, which may be operated in anysuitable manner to start and stop the motor, such as the automatic meansdescribed in my application previously referred to, of which thisapplication is a division.

As to the operation of my device let it be assumed that the sound recorddisc has been placed on the rotatable support and that it [is desired tostart the phonograph. The

switch lever 57 is operated as follows to close a circuit through theswitch contacts 53 and 55 which allows current to flow from the batteryB to binding post 58, thence through the electromagnetic winding 13 tothe contacts 27-and 28 tothe frame. or groundG, thence through thecontacts 45 and 46 of the governor to the binding post 59, through theswitch blades 55, 57 and 53 back to the battery B or other source ofcurrent. After giving the rotating support a starting impulse intheproper direction, the timer mechanism hereinbefore described, is broughtinto operation and opens and closes the circuit through theelectromagnet 13 intermittently at, the proper intervals to send themagnetic flux through the armature bodies 7 andtpole ieces 6 in such away that torque is pro need which rotates the support and the soundrecord body, the speedof which is controlled by the governor mechanismhereinbefore described and illustrated in Figures 3, 5 and 6. It Will beunderstood that a suitable dust proof cover is used in practice over thetimer mechanism but for the sake of clearness it is not shown in thedrawings.

In the wiring diagram, shown in Figure 2, it will be noted that thecondenser 17 is connected across the timer points 27 and 28 and that anon-inductive resistance R is contion and the scope of the appende 50said electromagnetic means.

nected across the governor points 45 and 46, both for the purposes well"understood in the art.

While I have shown and described cer- 5 tain details of one form of myinvention, I

ord body, a plura ity of armature bodies carried by said support, aplurality of stationary pole pieces arranged to cooperate with saidarmature bodies, electromagnetic means centrally located with respect tothe axis of said support for magnetically energizing all of saidarmature bodies andpole pieces simultaneously, and means for controllingthe time of action of said electromagnetic means for the purposedescribed.

2. A phonograph comprisin in combina-- tion, a movab e support for thesound record body, a plurality of armature bodies carried by saidsupport, a plurality of stationary pole pieces arranged to cooperate 36with said armature bodies, and a single electromagnetic means centrallylocated with respect to the axis of said support for magneticallyenergizing all of said armature bodies and pole pieces simultaneouslyand means for controlling the time of action of said electromagneticmeans for the purpose described.

3. A phonograph comprisin in combination, a movable support for thesound record body, a plurality of armature bodies carried by saidsupport, a plurality of stationary pole pieces corresponding in numberto said armature bodies and arranged to cooperate with said bodies and asingle electromagnetic means centrally located with respect to theaxis'of said support for magnetically energizing all of said armaturebodies and pole pieces simultaneously and means for controlling the timeof action of 4. A phonograph comprising in combination, a movablesupport for the sound record, body, a plurality of armature bodiescarried by said support and-extending downward therefrom in spacedrelation to each other, a plurality of stationary pole pieces similar innumber and spaced relationship to the armature bodles arranged on acommon base and extending upward to a cooperative position with saidarmature bodies and forming anenclosure, electromagnetic means centrallylocated with respect to the axis of said support and housed within saidenclosure for energizing all of said armature bodies and pole piecessimultaneously and means for controlling the action of theelectromagnetic means.

.5. A phonograph comprising in combination, a movable support for thesound record body, a plurality of armature bodies carried by saidsupport and extending downward therefrom in spaced relation to eachother, a plurality of stationary pole pieces similar in number andspaced relationship to the armature bodies arranged on a common base andextending upward to a cooperative position with said armature bodies, asingle electromagnetic means centrally located between the movablesupport and the said base for simultaneously magnetically energizing allthe said bodies and pole pieces and means for controlling the action ofthe electromagnetic means.

6. A phonograph comprising in combination, a movable support for thesound record body, a plurality of armature bodies carried by saidsupport, a base carrying pole, pieces to cooperate with said bodiesarranged around its periphery and also having a centrally arranged coreprojecting upward to-- ward the movable support, a winding disposedaround said core for energizing the core and all of said bodies andpole. pieces simultaneously and means to control the action of saidwinding.

7 A phonograph comprising in combination, a movable support for thesound-record body, a plurality of armature bodies carried by saidsupport, a base carrying pole pieces to cooperate with said bodiesarranged around its periphery and also having a centrally arranged coreprojecting upward toward the movable support and carrying a bearing forsaid support, a winding. disposed around said core for energizing thecore and all of said bodies and pole pieces simultaneouslyand means tocontrol the action of said Winding.

8. A phonograph comprising in combination two annu ar discs of magneticmaterial each having the same number of pole pieces extending toward andin close proximity to each other, one disc serving as a base and theother as a rotatable support for a sound record body, an electromagnetdisposed between the discs and having a core extending from one to theother, means for passing current intermittently through saidelectromagnet and means for controlling the speed of rotation of therotatable disc.

9. A phonograph comprising in combination two annular discs of magneticmaterial each having the same number of pole pie'ces extending towardand in close proximity to each other, one disc serving as a base and theother as a rotatable support for a sound record body, an electromagnetdisposed betweenthe discs and having a core extending from one to theother, and serving as a support for the upper disc and sound recordbody, means for passing cur-;

ergizing all of said armature bodies andpole pieces simultaneously,means for passing current through said electromagnetic means and meansfor controlling the current so that current impulses are sent throughthe electromagnetic means in such a manner that successive armaturebodies are brought into cooperation with succe'ssiv stationary polepieces as described.

11. A phonograph comprising in combination two annular discs of magneticmaterial each having the same number of pole pieces extending toward andin close proximity to each other, one disc serving as a base and theother as a rotatable support for a sound record body, electromagneticmeans for magnetically exciting said discs and all of said pole piecessimultaneously and successively and means for controlling the speed ofrotation of the rotatable member.

trical circuit through said electromagnetic means at intervalscorresponding to the number of said armature bodies and further meansfor controlling the speed of r0- tation of the movable support.

13. A phonograph comprising in combination, a movable support for thesound record body, a plurality of armature bodies carried by saidsupport, a plurality of stationary pole pieces corresponding in numberto said armature bodies and arranged .to cooperate with said bodies andva single electromagnetic means for magnetically energizing all of saidarmature bodies and pole pieces simultaneously, and an adjustable timerfor closing an electrical circuit through said electromagnetic means atintervals corresponding to the number of said armature bodies, andfurther adjustable means for controlling the speed of rotation of themovable support.

14. A phonograph comprising in combination a movable support for thesound record body, a plurality of armature bodies carried by saidsupport, a base carrying pole pieces arranged around its periphery tocooperate with said bodies and also having a centrally arranged hollowcore projecting upward toward, and carrying a bearing on its upper endfor the rotating support; a winding on said core, a shaft attached tothe rotating support and passing through said hollow core and having acam on the lower end, a timer member carried on an adjustable plate andoperated by said cam for intermittently passing current through saidwinding and a governor operated by the rotating support for controllingthe speed of its rotation.

In testimony whereof, I afiix my signature.

EDWARD J. TOMLINSON'.

